James gazeley



UNITED' STATES PATENT OFFICE.

JAMES GAZELEY; OF WATEBVLIET, NEW YORK.

CUTTER FOR MACHINES FOR CUTTlNG CYLINDRICAL FORMS FROM STONlt SPECIFICATION formng part of Letters Patent No. 248,033, dated October 11, 1881.

Application filed August 22, 1881. (No model.)

To all whom it may coneew: t

Be it known that I, JAMES GAZELEY, ot' Watervliet, in thecounty of Albany and State of New York, have invented certain new and useful Improvements in Cutters for Machines for Cutting Cylindrieal Cores from Stone, of which the following is a specitication.

My invention relates to an improvement on the invention for which Letters Patents No. 239,(308 ot' the United States were granted to me on the th day of April, 1881; and the object of this improvement is to provide for the machine described in the said patent a cutter that is adapted to the. production ot' circular cores from stone in a tapering 'o m and in such I per."eet manner that they may be used for columus and other similar' purposes; and this ob ject I attain by means of the device illustrated in the acconpanying drawings, which form part of this specification, and in whichi Figure lis a vertical section ot' my coniform cutter as attached to the cutter-head and shaft ot' the machine described in my above-named patent; and Fig. 2, a vertical section of ablock of stone, showing a conil'orn core cut out hut unremoved therefrom.`

As represented in the drawing s, A is the vertical shaft; B, the cutter-head; and O, the

-stcadiment for the upper end of the cutter, allas described in my Patent No. 239,(308, above referred to. i 4 i I D is' a eoniform tnbular cutter, seeured to the cutter-head B and' rotated by the shaft A.

The tapering form of said cutter is proportioned to suit the required diminish of the stonecor'e when eompleted,. and vertical s1ot-' ted openings d are forned in said cutter, for` the purpose of faclitating the introduction of suitable abrading material to the inner side of the cutter-tube in such manner that'it will be supplied at all points of the inner. or convex wearing-surface of the tube to eft'ect the cutting away of the core in a uniform manner to the conic form of the tube. I

'The lower end of the tubnlar cutter D may, when preferred, he provided with a re-enforcing portion, d', for increasing thesize of the annular incision produced by the lower end of the cutter; but as that feature of my device constitutes the subject for another patent a more particular description of it in this specifieation is unnecessary.

The operation of this improvement is as follows: The'block of stone having been fixed in the machine and the cutter adjusted to its position, as set forth in my prior patent, the machiue is set in motion to rotate the cutter, and

the abrading material, as descrihedin my aforosaid patent, is fed around the path of the cut ter, and by this operation the lower end of the cutter first produces an annularincision in the topof the stone. Then as the cut progresses downward the cutter D will prodnce a cylindrical bore in theshell of the stone, marked E in Fig. 2; but hy reason of the constantly-'decreasing diameter of the'inner side of the outter the core 'F is cut away to conform to the taper of the cutter. By means of the openings d the abrading material can be readily fed to the inner side of the cutter, so that the'entire surface of thatportion of the tube will perform its work in an effective manner and much more perfectly than where the abrading material is fed into the tube at the top of the stone;

ting cylindrical cores from stone, the coniealtuhular cutter D, adapted to produce a coniform core from a hlockof stone in the mnnner herein described. V

2. A eonieal cutter, tubular or segmental, for producing coniform cores from stone, and provided with openings through its sides for facilitatng the feeding of ahrading material to the inner surfaces of said cutter, as and for the purpose herein specified.

JAMES GAZELE Y.-

Witnesses V WILLIAM H. Low, 4 CHAS. F. SGATTERGQOD. 

